Hi all,
I hope you are all having a good holiday!
I need some help!
My burglar alarm at home is causing me a problem. Four of the buttons aren’t working so I need a new 4 digit code.
The buttons that aren’t working are the 0, 4, 5 and the 7 so that leaves me with just the 1, 2, 3, 6, 8, 9.
Can you choose four numbers from the buttons available and tell me all the possible four digit codes I could choose from.
Thanks!
9863,2136,12398,8632,9236,12368,9832.
Hi Sawaira.
Thanks for your help. Do you think you have found all of the possibilities? How do you know? (Some 5 digit numbers have appeared too).
Hope you’re having a good holiday!
Mr M
hi mr m it could be 23689
9362,8263
I know there was a five digit number but i only realized after i posted the comment and i didn’t know how to edit it.
Thanks for your replies guys. How many possible combinations are there between 7000 and 9000?
Mrs Murphy has also asked that you find all the even numbers possibilities.
Thanks again!
Hi Mr Murphy,
I found 17 possibilities and the possibilities are:
1236, 1238, 1239, 1268, 1269, 1289, 1298, 6321, 8321, 9321, 8621
9621, 9863, 9862, 9861, 9832, 9831.
That’s a great answer Ariana! Have you been systematic and how do you know?
Hi Mr Murphey this might help,126,1248!
You could have 1236 or 9863.
1236,1238,1239,1263,1268,1269,1266,1289,1288,1823,1829
1236,9681,8236 here’s some.